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Counter batching service for Usergrid distributed counter architechture

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/*******************************************************************************
 * Copyright 2012 Apigee Corporation
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package com.usergrid.count;

import com.usergrid.count.common.Count;
import com.usergrid.count.AbstractBatcher.Batch;
import com.yammer.metrics.Metrics;
import com.yammer.metrics.annotation.Timed;
import com.yammer.metrics.core.Timer;
import com.yammer.metrics.core.TimerContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.concurrent.*;

/**
 * A BatchSubmitter that prints contents to the configured slf4j logger logger
 * @author zznate
 */
public class Slf4JBatchSubmitter implements BatchSubmitter {

    // TODO custom logger for printing counts
    // - should be configed programatically
    private Logger log = LoggerFactory.getLogger(Slf4JBatchSubmitter.class);

    private int threadCount = 3;

    private ExecutorService executor = Executors.newFixedThreadPool(threadCount);
    private final Timer addTimer =
            Metrics.newTimer(Slf4JBatchSubmitter.class, "submit_invocation", TimeUnit.MICROSECONDS, TimeUnit.SECONDS);

    @Override
    public Future submit(final Batch batch) {
        return executor.submit(new Callable